Added missing _SC_2_FORT_RUN case.  Fixed _SC_ATEXIT_MAX to match atexit.c.
Added missing _SC_2_FORT_RUN case.  Fixed _SC_ATEXIT_MAX to match atexit.c.

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc